The Five Latest Celebrity Diets You Won't Believe

Vinegar shots. Cookie meals. Baby food. Many stars are embracing strange new weight-loss plans—and it seems the crazier the better. Do they really work?

The plan: Devotees believe that cooking food destroys its nutritional value, so they eat fruits, vegetables, nuts, and grains that are not heated above 116 degrees (meat and chicken are out).

The pros and cons: It's easy to shed pounds when you're eating lots of unprocessed fruits and vegetables, which are low in saturated fats and calories and high in filling fiber. But let's face it, it's also boring. And unless you're willing to live on salads and smoothies, the diet pretty much requires a personal chef or a raw-food restaurant to make the food more appealing.

The bottom line: It's really hard to stick with this diet—and to do it healthfully. Getting enough protein, calcium, and B-complex vitamins can be a challenge; plus, too much fruit can cause intestinal distress and increase insulin (making the body store calories as fat).